72070001 has 2 divisors, whose sum is σ = 72070002. Its totient is φ = 72070000.

The previous prime is 72069967. The next prime is 72070051. The reversal of 72070001 is 10007027.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63361600 + 8708401 = 7960^2 + 2951^2 .

It is a cyclic number.

It is not a de Polignac number, because 72070001 - 2⁶ = 72069937 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72070051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36035000 + 36035001.

It is an arithmetic number, because the mean of its divisors is an integer number (36035001).

Almost surely, 2^72070001 is an apocalyptic number.

It is an amenable number.

72070001 is a deficient number, since it is larger than the sum of its proper divisors (1).

72070001 is an equidigital number, since it uses as much as digits as its factorization.

72070001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 98, while the sum is 17.

The square root of 72070001 is about 8489.4052206265. The cubic root of 72070001 is about 416.1515431148.

Adding to 72070001 its reverse (10007027), we get a palindrome (82077028).

The spelling of 72070001 in words is "seventy-two million, seventy thousand, one".